An analytical model for predicting the behaviour of laterally restrained reinforced concrete beams.

摘要

In this thesis, an analytical model for predicting the response of laterally restrained, reinforced concrete beams and slab strips is proposed. This model is formulated using a sectional analysis approach that assumes plane sections remain plane, and accounts for both material nonlinearities and second-order effects. A refined version of the model is developed to account for varying support stiffness, diagonal compression field action, slip relative to the support, and bond deterioration. The refined model is shown to correlate well with test data from two existing experimental investigations on laterally restrained beams. Finally, a series of parametric studies are presented to illustrate the influence of concrete strength, mechanical reinforcement ratio, second-order effects, and slip at a support on the capacity of laterally restrained beams or slab strips. The proposed analytical model presented in this thesis provides the basis for the development of a simplified method that can be incorporated into design standards.